What is the compression ratio of the Harley 103 engine?
Harley 103 Engine Features Electronic Sequential Port Fuel Injection Four-Point Engine Isolation System Compression Ratio 9.6:1
How fast can a 103 Harley Davidson go?
How fast can the Harley 103 engine go? On average, Harley motorcycles have a top speed of about 115 mph. This is quite impressive when you consider the average time it takes (4.3 seconds) to move from 0 mph to 60 mph.
Does your 103 make 110/111 on the dyno?
My 103 makes 110/111 on the dyno and that was before the new cam set up that they are using. I am sure they are making more now. George and his crew are the best. Was not so very long ago a PA-based tuning center tuned a 103" combo we had built several years prior, and just finally got it tuned after maaaaaaaaaany miles.
What bore size pistons for SE cast flat tops?
You have to measure the bore to find out what over bore will be required to clean up and true the bore, then order pistons. Or, as others have suggested, bite the bullet and bore to 3.875" and fit new SE cast flat tops.
How big can you bore a Harley 103?
The 103 has a 3.875" bore and a 4.375" stroke. . 010" over now = 3.885" bore.
Are Harley 96 and 103 heads the same?
Registered. Yes the heads are same valve and chamber size for both motors.
What year did Harley make the 103 high output?
2010The company released 103 cu in (1,690 cc) for 2010 Electra Glide Ultra Limited models, and later for 2012 Softail models and 110 cu in (1,801 cc) for Screamin' Eagle/CVO Models.
How many HP is a 103 Harley?
STAGE 4 KIT – 103 CUBIC INCHES This Street Performance Kit produces 103 hp and 110 lbs-ft of torque.
What is the difference between a Harley 103 and 103 high output?
Harley reports that the Twin Cooled 103 has 10.7 percent more torque than the standard 103, although no horsepower figures are offered. The High Output Twin Cam 103 gets more cam lift and a better-flowing airbox for more torque compared to a standard Twin Cam 103.
What is high mileage for a Harley-Davidson?
For sports bikes, 25,000 miles can be a lot. Harley-Davidson® motorcycles are built to last much longer. If a bike has good maintenance records, no signs of damage and no oil leaks, even a bike with 40,000 to 50,000 miles can be expected to last a long time.
When did Street Glide get 103?
2011103 Cubic Inches Plus It's a standard feature on the 2011 Road King Classic, Electra Glide Ultra Limited, and Road Glide Ultra machines, and will be available as a factory-installed option on the 2011 Street Glide and Road Glide Custom models.
Are Harley Twin Cam engines reliable?
There are plenty of defects in the Twin Cam engines. Enough potential issues to actually alarm you and make you think twice before buying one. The main problem of the Twin Cam engine of the Harley Davidson is probably it's the design aspect of the cam chain system. The actual design itself is designed poorly.
How long will a Twin Cam 88 last?
The twin cam was designed to last 100,000 miles without needing major service with regular maintenance.
What is a Stage 1 Harley?
A Stage 1 upgrade involves modifying a Harley-Davidson's exhaust system, air filter and fuel metering system allowing an increase in power & torque. When the bike is fitted with an uprated air filter & exhaust the performance from the engine is greatly increased.
How much horsepower does a Screamin Eagle have?
121 horsepowerMeet the Screamin' Eagle 131 Milwaukee-Eight – the “most powerful street-compliant engine that Harley-Davidson has ever created.” How powerful? When equipped with Screamin' Eagle Street Cannon mufflers, the 131 produces 131 ft/lbs of torque and 121 horsepower at the rear wheel.
How much horsepower does a Milwaukee 8 107 have?
77 HPDyno Jet pageStock Milwaukee-Eight 10777 HP101 ft lbs torqueMilwaukee-Eight 107 Stage 185 HP104 ft lbs torqueMilwaukee-Eight 107 Stage 2 with Torque Cam99 HP109 ft lbs torqueMilwaukee-Eight 107 Stage 2 with Power Cam103 HP108 ft lbs torqueMilwaukee-Eight Stage 3 (114 cu. in.)115 HP121 ft lbs torque1 more row
CalgaryBikeBum Active Member
Doing my 103 build and new bearings in ,crank is in ,seals are in, cases put back together. Had cylinders machined to fit new pistons. When I checked pistons they are marked STD (which is 1550 or 3.875") but they are actually 3.885 which equates to +.010 ? Luckily we measured pistons and fitted them based on that and not the sizes on the sheets.
CalgaryBikeBum Active Member
You are welcome and I have an update. I typed in those kit numbers on the off chance I would see something related. Wow. I"m not the only one. One guy (must be an builder) bought five sets and all 5 were the same. Marked std but actually .010 + with std rings.
HarryB737 Junior Member
I agree it's always better to mic things out first, I pulled & rebuilt a '73 Pinto 2000cc inline 4, after I got it back together, Oil light came on, I shut it down & after some investigating I found out the Block from the factory was "Line-bored" .010' oversized...needless to say I had to special order a set of Main bearings (Federal Mogal) that were thicker than what the supply houses normally carried.
Jack Klarich Guest
Wonder who is filling these packages, Made and packaged here or over seas, where is the quality control. Bet The MOCO has alot of builders upset here,Good for you checking before you had a major problem, it pays to check and double check details like this, Jack
ironmark Junior Member
Are you putting the 103" kit in a 2000 bike ? The big bore kit for a 88" only took the bike to a 95" . What I am thinking is the 103" kit was ment for the newer ( 07 & up ) 96" motor and there may be some differences in the kits .
Animal Active Member
Where are you getting the work done in Calgary, sounds like they know what they are doing.
Why is the 103 HO engine more compression?
The cam will change the compression ratio more than a head gasket will.
What changes not static compression?
It is the corrected compression that changes not static compression.#N#The cam changes the timing so the amount of compression in the cylinder when the spark plug fires is the corrected compression.#N#If the spark plug fires before or after the piston is at TDC than the compression changed because the volume of air and fuel is not at the max compression.#N#The different cams change the opening and closing of the valves some open before TDC some open after TDC and the ignition timing is different on most cams this all leads to corrected compression.
